Achemist decomposes several samples of carbon monoxide into carbon and oxygen and weighs the resultant elements. the results are shown below:

sample
mass of carbon (g)
6,12,18
mass of oxygen
(g) 8,16,24
part a
do you notice a pattern in these results?

The mass of carbon and oxygen pair from the decomposition of carbon monoxide has an obvious pattern of 3 carbon : 4 oxygen. This can be explained by the balanced chemical equation of the decomposition of CO. 

6g carbon : 8g oxygen
12g carbon : 16g oxygen
18g carbon : 24g oxygen

These all results to a common ration of 3g C is to 4g O2

Temperature and pressure